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mabye one day

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ed
2026-06-01 22:01:22 -04:00
parent 690d184acf
commit d776d71574
2 changed files with 81 additions and 38 deletions
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code/duffle/gte.h
+29 -24
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@@ -207,45 +207,50 @@ enum { _C2_OPS_ = 0
* hardwired form the "placeholder-pun" — GCC is forced to bind r_ptr to
* $12, which is exactly the register the .word constants expect.
*
* Uses asm_volatile_4(code, outs, ins, clb) from gcc_asm.h.
* Uses asm_block_4(code, outs, ins, clb) from gcc_asm.h.
* asm_inline(...) produces the 2-colon code:outputs:inputs body
* "r"(r_ptr) is the runtime-input section body
* "$2", ..., "$12" is the clobber section body
* asm_volatile_4() joins them with 3 colons and wraps in asm volatile
* asm_block_4() joins them with 3 colons and wraps in asm volatile
*
* The parens `(...)` around each section let the preprocessor treat the
* section's contents as a single arg (shielding internal commas), and
* the `_strip` helper inside asm_block_4 removes those parens so the
* final C code is clean.
*/
#define gte_load_v0(r_ptr) \
asm_volatile_4( \
(asm_inline( gte_lwc2_v0_RT4, gte_lwc2_v0z_RT4 )), \
(), \
("r"(r_ptr)), \
("$2", "$8", "$9", "$31", "memory", "$12") \
asm_block_4( \
(asm_inline( gte_lwc2_v0_RT4, gte_lwc2_v0z_RT4 )), \
(), \
("r"(r_ptr)), \
("$2", "$8", "$9", "$31", "memory", "$12") \
)
#define gte_load_v1(r_ptr) \
asm_volatile_4( \
(asm_inline( gte_lwc2_v1_RT4, gte_lwc2_v1z_RT4 )), \
(), \
("r"(r_ptr)), \
("$2", "$8", "$9", "$31", "memory", "$12") \
asm_block_4( \
(asm_inline( gte_lwc2_v1_RT4, gte_lwc2_v1z_RT4 )), \
(), \
("r"(r_ptr)), \
("$2", "$8", "$9", "$31", "memory", "$12") \
)
#define gte_load_v2(r_ptr) \
asm_volatile_4( \
(asm_inline( gte_lwc2_v2_RT4, gte_lwc2_v2z_RT4 )), \
(), \
("r"(r_ptr)), \
("$2", "$8", "$9", "$31", "memory", "$12") \
asm_block_4( \
(asm_inline( gte_lwc2_v2_RT4, gte_lwc2_v2z_RT4 )), \
(), \
("r"(r_ptr)), \
("$2", "$8", "$9", "$31", "memory", "$12") \
)
/* All three at once -- the canonical prelude to gte_cmd_rtpt. */
#define gte_load_v0v1v2(r_ptr) \
asm_volatile_4( \
(asm_inline( gte_lwc2_v0_RT4, gte_lwc2_v0z_RT4, \
gte_lwc2_v1_RT4, gte_lwc2_v1z_RT4, \
gte_lwc2_v2_RT4, gte_lwc2_v2z_RT4 )), \
(), \
("r"(r_ptr)), \
("$2", "$8", "$9", "$31", "memory", "$12") \
asm_block_4( \
(asm_inline( gte_lwc2_v0_RT4, gte_lwc2_v0z_RT4, \
gte_lwc2_v1_RT4, gte_lwc2_v1z_RT4, \
gte_lwc2_v2_RT4, gte_lwc2_v2z_RT4 )), \
(), \
("r"(r_ptr)), \
("$2", "$8", "$9", "$31", "memory", "$12") \
)
/**