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Element-typed parameters and index scaling (eliminate manual byte/cell math) #66

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Open
Element-typed parameters and index scaling (eliminate manual byte/cell math)#66
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enhancementNew feature or request

Description

@tetsuo-cpp
tetsuo-cpp
opened on Aug 9, 2026

Summary

Make parameter (and shared) declarations carry element type and size so indexing is in elements by default, removing error-prone 4 * / CELLS patterns for narrow types.

Motivation

demo/attention.forth must use byte addressing for f32 globals:

2 PICK HEAD_DIM * I + 4 * Q + F32@

while f64 shared uses CELLS. Mixing F32@ (4-byte) with cell-oriented mental models is a footgun and obscures algorithms.

Proposed model

\! param Q f32[32768]
\! param SCALE f64
\! shared SCORES f64[1024]

Using Q pushes a typed base; indexing words scale by element size:

Word / formBehavior
i Q []@ or Q I @load element i of Q with correct width/address space
x i Q []!store element
Or keep Q I CELLS + @ but define CELLS relative to the pointer’s element type

Minimum viable improvement:

  1. Allow f32 / i32 / f16 / … in \! param / \! shared (not only i64/f64 storage with separate access words).
  2. Document that addresses are byte addresses always, or introduce element-pointer types — pick one model and stick to it.
  3. Provide []@ / []! (or typed @) that scale correctly.

Acceptance criteria

  • Header accepts reduced-width element types for params (and ideally shared)
  • At least one ergonomic indexing path that does not require manual 4 * for f32
  • Attention-style kernel can be rewritten more clearly
  • LIT + language doc updates
  • Clarify relationship to existing F32@ / I32@ / CELLS words (compat policy)

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Element-typed parameters and index scaling (eliminate manual byte/cell math) · Issue #66 · tetsuo-cpp/warpforth · GitHub
      Skip to content
      Element-typed parameters and index scaling (eliminate manual byte/cell math) #66
      Open
      Open
      Element-typed parameters and index scaling (eliminate manual byte/cell math)#66
      Labels
      enhancementNew feature or request
      Description
      @tetsuo-cpp
      tetsuo-cpp
      opened on Aug 9, 2026
      Summary
      Make parameter (and shared) declarations carry element type and size so indexing is in elements by default, removing error-prone 4 * / CELLS patterns for narrow types.
      Motivation
      demo/attention.forth must use byte addressing for f32 globals:
      2 PICK HEAD_DIM * I + 4 * Q + F32@
      while f64 shared uses CELLS. Mixing F32@ (4-byte) with cell-oriented mental models is a footgun and obscures algorithms.
      Proposed model
      \! param Q f32[32768]
\! param SCALE f64
\! shared SCORES f64[1024]
      Using Q pushes a typed base; indexing words scale by element size:
      Word / formBehavior
      i Q []@ or Q I @load element i of Q with correct width/address space
      x i Q []!store element
      Or keep Q I CELLS + @ but define CELLS relative to the pointer’s element type
      Minimum viable improvement:
      1. Allow f32 / i32 / f16 / … in \! param / \! shared (not only i64/f64 storage with separate access words).
      2. Document that addresses are byte addresses always, or introduce element-pointer types — pick one model and stick to it.
      3. Provide []@ / []! (or typed @) that scale correctly.
      Acceptance criteria
      •  Header accepts reduced-width element types for params (and ideally shared)
      •  At least one ergonomic indexing path that does not require manual 4 * for f32
      •  Attention-style kernel can be rewritten more clearly
      •  LIT + language doc updates
      •  Clarify relationship to existing F32@ / I32@ / CELLS words (compat policy)
      Related
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var __m = "*";
var __re = new RegExp('^' + ".*" + '
Element-typed parameters and index scaling (eliminate manual byte/cell math) · Issue #66 · tetsuo-cpp/warpforth · GitHub
          Skip to content
          Element-typed parameters and index scaling (eliminate manual byte/cell math) #66
          Open
          Open
          Element-typed parameters and index scaling (eliminate manual byte/cell math)#66
          Labels
          enhancementNew feature or request
          Description
          @tetsuo-cpp
          tetsuo-cpp
          opened on Aug 9, 2026
          Summary
          Make parameter (and shared) declarations carry element type and size so indexing is in elements by default, removing error-prone 4 * / CELLS patterns for narrow types.
          Motivation
          demo/attention.forth must use byte addressing for f32 globals:
          2 PICK HEAD_DIM * I + 4 * Q + F32@
          while f64 shared uses CELLS. Mixing F32@ (4-byte) with cell-oriented mental models is a footgun and obscures algorithms.
          Proposed model
          \! param Q f32[32768]
\! param SCALE f64
\! shared SCORES f64[1024]
          Using Q pushes a typed base; indexing words scale by element size:
          Word / formBehavior
          i Q []@ or Q I @load element i of Q with correct width/address space
          x i Q []!store element
          Or keep Q I CELLS + @ but define CELLS relative to the pointer’s element type
          Minimum viable improvement:
          1. Allow f32 / i32 / f16 / … in \! param / \! shared (not only i64/f64 storage with separate access words).
          2. Document that addresses are byte addresses always, or introduce element-pointer types — pick one model and stick to it.
          3. Provide []@ / []! (or typed @) that scale correctly.
          Acceptance criteria
          •  Header accepts reduced-width element types for params (and ideally shared)
          •  At least one ergonomic indexing path that does not require manual 4 * for f32
          •  Attention-style kernel can be rewritten more clearly
          •  LIT + language doc updates
          •  Clarify relationship to existing F32@ / I32@ / CELLS words (compat policy)
          Related
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            Labels
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Element-typed parameters and index scaling (eliminate manual byte/cell math) · Issue #66 · tetsuo-cpp/warpforth · GitHub
              Skip to content
              Element-typed parameters and index scaling (eliminate manual byte/cell math) #66
              Open
              Open
              Element-typed parameters and index scaling (eliminate manual byte/cell math)#66
              Labels
              enhancementNew feature or request
              Description
              @tetsuo-cpp
              tetsuo-cpp
              opened on Aug 9, 2026
              Summary
              Make parameter (and shared) declarations carry element type and size so indexing is in elements by default, removing error-prone 4 * / CELLS patterns for narrow types.
              Motivation
              demo/attention.forth must use byte addressing for f32 globals:
              2 PICK HEAD_DIM * I + 4 * Q + F32@
              while f64 shared uses CELLS. Mixing F32@ (4-byte) with cell-oriented mental models is a footgun and obscures algorithms.
              Proposed model
              \! param Q f32[32768]
\! param SCALE f64
\! shared SCORES f64[1024]
              Using Q pushes a typed base; indexing words scale by element size:
              Word / formBehavior
              i Q []@ or Q I @load element i of Q with correct width/address space
              x i Q []!store element
              Or keep Q I CELLS + @ but define CELLS relative to the pointer’s element type
              Minimum viable improvement:
              1. Allow f32 / i32 / f16 / … in \! param / \! shared (not only i64/f64 storage with separate access words).
              2. Document that addresses are byte addresses always, or introduce element-pointer types — pick one model and stick to it.
              3. Provide []@ / []! (or typed @) that scale correctly.
              Acceptance criteria
              •  Header accepts reduced-width element types for params (and ideally shared)
              •  At least one ergonomic indexing path that does not require manual 4 * for f32
              •  Attention-style kernel can be rewritten more clearly
              •  LIT + language doc updates
              •  Clarify relationship to existing F32@ / I32@ / CELLS words (compat policy)
              Related
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              Assignees
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                Labels
                enhancementNew feature or request
                Projects
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                  No milestone
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, 'i');
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var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Element-typed parameters and index scaling (eliminate manual byte/cell math) · Issue #66 · tetsuo-cpp/warpforth · GitHub
                  Skip to content
                  Element-typed parameters and index scaling (eliminate manual byte/cell math) #66
                  Open
                  Open
                  Element-typed parameters and index scaling (eliminate manual byte/cell math)#66
                  Labels
                  enhancementNew feature or request
                  Description
                  @tetsuo-cpp
                  tetsuo-cpp
                  opened on Aug 9, 2026
                  Summary
                  Make parameter (and shared) declarations carry element type and size so indexing is in elements by default, removing error-prone 4 * / CELLS patterns for narrow types.
                  Motivation
                  demo/attention.forth must use byte addressing for f32 globals:
                  2 PICK HEAD_DIM * I + 4 * Q + F32@
                  while f64 shared uses CELLS. Mixing F32@ (4-byte) with cell-oriented mental models is a footgun and obscures algorithms.
                  Proposed model
                  \! param Q f32[32768]
\! param SCALE f64
\! shared SCORES f64[1024]
                  Using Q pushes a typed base; indexing words scale by element size:
                  Word / formBehavior
                  i Q []@ or Q I @load element i of Q with correct width/address space
                  x i Q []!store element
                  Or keep Q I CELLS + @ but define CELLS relative to the pointer’s element type
                  Minimum viable improvement:
                  1. Allow f32 / i32 / f16 / … in \! param / \! shared (not only i64/f64 storage with separate access words).
                  2. Document that addresses are byte addresses always, or introduce element-pointer types — pick one model and stick to it.
                  3. Provide []@ / []! (or typed @) that scale correctly.
                  Acceptance criteria
                  •  Header accepts reduced-width element types for params (and ideally shared)
                  •  At least one ergonomic indexing path that does not require manual 4 * for f32
                  •  Attention-style kernel can be rewritten more clearly
                  •  LIT + language doc updates
                  •  Clarify relationship to existing F32@ / I32@ / CELLS words (compat policy)
                  Related
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    enhancementNew feature or request
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
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, 'i');
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Element-typed parameters and index scaling (eliminate manual byte/cell math) · Issue #66 · tetsuo-cpp/warpforth · GitHub
                      Skip to content
                      Element-typed parameters and index scaling (eliminate manual byte/cell math) #66
                      Open
                      Open
                      Element-typed parameters and index scaling (eliminate manual byte/cell math)#66
                      Labels
                      enhancementNew feature or request
                      Description
                      @tetsuo-cpp
                      tetsuo-cpp
                      opened on Aug 9, 2026
                      Summary
                      Make parameter (and shared) declarations carry element type and size so indexing is in elements by default, removing error-prone 4 * / CELLS patterns for narrow types.
                      Motivation
                      demo/attention.forth must use byte addressing for f32 globals:
                      2 PICK HEAD_DIM * I + 4 * Q + F32@
                      while f64 shared uses CELLS. Mixing F32@ (4-byte) with cell-oriented mental models is a footgun and obscures algorithms.
                      Proposed model
                      \! param Q f32[32768]
\! param SCALE f64
\! shared SCORES f64[1024]
                      Using Q pushes a typed base; indexing words scale by element size:
                      Word / formBehavior
                      i Q []@ or Q I @load element i of Q with correct width/address space
                      x i Q []!store element
                      Or keep Q I CELLS + @ but define CELLS relative to the pointer’s element type
                      Minimum viable improvement:
                      1. Allow f32 / i32 / f16 / … in \! param / \! shared (not only i64/f64 storage with separate access words).
                      2. Document that addresses are byte addresses always, or introduce element-pointer types — pick one model and stick to it.
                      3. Provide []@ / []! (or typed @) that scale correctly.
                      Acceptance criteria
                      •  Header accepts reduced-width element types for params (and ideally shared)
                      •  At least one ergonomic indexing path that does not require manual 4 * for f32
                      •  Attention-style kernel can be rewritten more clearly
                      •  LIT + language doc updates
                      •  Clarify relationship to existing F32@ / I32@ / CELLS words (compat policy)
                      Related
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        enhancementNew feature or request
                        Projects
                        No projects
                          Milestone
                          No milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Element-typed parameters and index scaling (eliminate manual byte/cell math) · Issue #66 · tetsuo-cpp/warpforth · GitHub
                          Skip to content
                          Element-typed parameters and index scaling (eliminate manual byte/cell math) #66
                          Open
                          Open
                          Element-typed parameters and index scaling (eliminate manual byte/cell math)#66
                          Labels
                          enhancementNew feature or request
                          Description
                          @tetsuo-cpp
                          tetsuo-cpp
                          opened on Aug 9, 2026
                          Summary
                          Make parameter (and shared) declarations carry element type and size so indexing is in elements by default, removing error-prone 4 * / CELLS patterns for narrow types.
                          Motivation
                          demo/attention.forth must use byte addressing for f32 globals:
                          2 PICK HEAD_DIM * I + 4 * Q + F32@
                          while f64 shared uses CELLS. Mixing F32@ (4-byte) with cell-oriented mental models is a footgun and obscures algorithms.
                          Proposed model
                          \! param Q f32[32768]
\! param SCALE f64
\! shared SCORES f64[1024]
                          Using Q pushes a typed base; indexing words scale by element size:
                          Word / formBehavior
                          i Q []@ or Q I @load element i of Q with correct width/address space
                          x i Q []!store element
                          Or keep Q I CELLS + @ but define CELLS relative to the pointer’s element type
                          Minimum viable improvement:
                          1. Allow f32 / i32 / f16 / … in \! param / \! shared (not only i64/f64 storage with separate access words).
                          2. Document that addresses are byte addresses always, or introduce element-pointer types — pick one model and stick to it.
                          3. Provide []@ / []! (or typed @) that scale correctly.
                          Acceptance criteria
                          •  Header accepts reduced-width element types for params (and ideally shared)
                          •  At least one ergonomic indexing path that does not require manual 4 * for f32
                          •  Attention-style kernel can be rewritten more clearly
                          •  LIT + language doc updates
                          •  Clarify relationship to existing F32@ / I32@ / CELLS words (compat policy)
                          Related
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            enhancementNew feature or request
                            Projects
                            No projects
                              Milestone
                              No milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
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Element-typed parameters and index scaling (eliminate manual byte/cell math) · Issue #66 · tetsuo-cpp/warpforth · GitHub
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                              Element-typed parameters and index scaling (eliminate manual byte/cell math) #66
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                              Element-typed parameters and index scaling (eliminate manual byte/cell math)#66
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                              enhancementNew feature or request
                              Description
                              @tetsuo-cpp
                              tetsuo-cpp
                              opened on Aug 9, 2026
                              Summary
                              Make parameter (and shared) declarations carry element type and size so indexing is in elements by default, removing error-prone 4 * / CELLS patterns for narrow types.
                              Motivation
                              demo/attention.forth must use byte addressing for f32 globals:
                              2 PICK HEAD_DIM * I + 4 * Q + F32@
                              while f64 shared uses CELLS. Mixing F32@ (4-byte) with cell-oriented mental models is a footgun and obscures algorithms.
                              Proposed model
                              \! param Q f32[32768]
\! param SCALE f64
\! shared SCORES f64[1024]
                              Using Q pushes a typed base; indexing words scale by element size:
                              Word / formBehavior
                              i Q []@ or Q I @load element i of Q with correct width/address space
                              x i Q []!store element
                              Or keep Q I CELLS + @ but define CELLS relative to the pointer’s element type
                              Minimum viable improvement:
                              1. Allow f32 / i32 / f16 / … in \! param / \! shared (not only i64/f64 storage with separate access words).
                              2. Document that addresses are byte addresses always, or introduce element-pointer types — pick one model and stick to it.
                              3. Provide []@ / []! (or typed @) that scale correctly.
                              Acceptance criteria
                              •  Header accepts reduced-width element types for params (and ideally shared)
                              •  At least one ergonomic indexing path that does not require manual 4 * for f32
                              •  Attention-style kernel can be rewritten more clearly
                              •  LIT + language doc updates
                              •  Clarify relationship to existing F32@ / I32@ / CELLS words (compat policy)
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