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| author | Kartik Agaram <vc@akkartik.com> | 2020-10-05 10:16:53 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-10-05 10:25:25 -0700 |
| commit | f13576b5d273ef9175e938b15f55bb1ead22fb1d (patch) | |
| tree | a54c4667e384a7eec44d0e5e7c2da687b670b7e9 /apps/mu.subx | |
| parent | bb3ce6cdea12ff00b998c5a1c6dbf2c83dba77c2 (diff) | |
| download | mu-f13576b5d273ef9175e938b15f55bb1ead22fb1d.tar.gz | |
6957
The final fix to the raytracing program involves rounding modes. It turns out x86 processors round floats by default, unlike C which has trained me to expect truncation. Rather than mess with the MXCSR register, I added another instruction for truncation. Now milestone 3 emits perfectly correct results.
Diffstat (limited to 'apps/mu.subx')
| -rw-r--r-- | apps/mu.subx | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/apps/mu.subx b/apps/mu.subx index 18c2d2e1..075e3b7a 100644 --- a/apps/mu.subx +++ b/apps/mu.subx @@ -19833,6 +19833,46 @@ _Primitive-convert-xreg-to-reg: # (payload primitive) 1/imm32/xm32-is-first-inout 0/imm32/no-x32 0x11/imm32/alloc-id:fake + _Primitive-truncate-xmem-to-reg/imm32/next +_Primitive-truncate-xmem-to-reg: # (payload primitive) + 0x11/imm32/alloc-id:fake:payload + # var1/reg <- truncate var2 => f3 0f 2c/truncate-to-int var2/xm32 var1/r32 + 0x11/imm32/alloc-id:fake + _string-truncate/imm32/name + 0x11/imm32/alloc-id:fake + Single-float-var-in-mem/imm32/inouts + 0x11/imm32/alloc-id:fake + Single-int-var-in-some-register/imm32/outputs + 0x11/imm32/alloc-id:fake + _string_f3_0f_2c_truncate_to_int/imm32/subx-name + 0/imm32/no-rm32 + 3/imm32/r32-is-first-output + 0/imm32/no-imm32 + 0/imm32/no-imm8 + 0/imm32/no-disp32 + 1/imm32/xm32-is-first-inout + 0/imm32/no-x32 + 0x11/imm32/alloc-id:fake + _Primitive-truncate-xreg-to-reg/imm32/next +_Primitive-truncate-xreg-to-reg: # (payload primitive) + 0x11/imm32/alloc-id:fake:payload + # var1/reg <- truncate var2/xreg => f3 0f 2c/truncate-to-int var2/xm32 var1/r32 + 0x11/imm32/alloc-id:fake + _string-truncate/imm32/name + 0x11/imm32/alloc-id:fake + Single-float-var-in-some-register/imm32/inouts + 0x11/imm32/alloc-id:fake + Single-int-var-in-some-register/imm32/outputs + 0x11/imm32/alloc-id:fake + _string_f3_0f_2c_truncate_to_int/imm32/subx-name + 0/imm32/no-rm32 + 3/imm32/r32-is-first-output + 0/imm32/no-imm32 + 0/imm32/no-imm8 + 0/imm32/no-disp32 + 1/imm32/xm32-is-first-inout + 0/imm32/no-x32 + 0x11/imm32/alloc-id:fake _Primitive-reinterpret-xmem-as-reg/imm32/next # - reinterpret bytes (just for debugging) _Primitive-reinterpret-xmem-as-reg: # (payload primitive) @@ -21732,6 +21772,11 @@ _string-convert: # (payload array byte) # "convert" 0x7/imm32/size 0x63/c 0x6f/o 0x6e/n 0x76/v 0x65/e 0x72/r 0x74/t +_string-truncate: # (payload array byte) + 0x11/imm32/alloc-id:fake:payload + # "truncate" + 0x8/imm32/size + 0x74/t 0x72/r 0x75/u 0x6e/n 0x63/c 0x61/a 0x74/t 0x65/e _string-reinterpret: # (payload array byte) 0x11/imm32/alloc-id:fake:payload # "reinterpret" @@ -22014,6 +22059,11 @@ _string_f3_0f_2d_convert_to_int: # "f3 0f 2d/convert-to-int" 0x17/imm32/size 0x66/f 0x33/3 0x20/space 0x30/0 0x66/f 0x20/space 0x32/2 0x64/d 0x2f/slash 0x63/c 0x6f/o 0x6e/n 0x76/v 0x65/e 0x72/r 0x74/t 0x2d/dash 0x74/t 0x6f/o 0x2d/dash 0x69/i 0x6e/n 0x74/t +_string_f3_0f_2c_truncate_to_int: + 0x11/imm32/alloc-id:fake:payload + # "f3 0f 2c/truncate-to-int" + 0x18/imm32/size + 0x66/f 0x33/3 0x20/space 0x30/0 0x66/f 0x20/space 0x32/2 0x63/c 0x2f/slash 0x74/t 0x72/r 0x75/u 0x6e/n 0x63/c 0x61/a 0x74/t 0x65/e 0x2d/dash 0x74/t 0x6f/o 0x2d/dash 0x69/i 0x6e/n 0x74/t _string_f3_0f_58_add: 0x11/imm32/alloc-id:fake:payload # "f3 0f 58/add" |