On Sat, Oct 19, 2024 at 2:06 AM Antoni Boucher <boua...@zoho.com> wrote:
>
> Thanks for the review.
> Here's the updated patch.
>
> Le 2024-10-17 à 21 h 50, Hongtao Liu a écrit :
> > On Fri, Oct 18, 2024 at 9:08 AM Antoni Boucher <boua...@zoho.com> wrote:
> >>
> >> Hi.
> >> This is a patch for the bug 116725.
> >> I'm not sure if it is a good fix, but it seems to do the job.
> >> If you have suggestions for better comments than what I wrote that would
> >> explain what's happening, I'm open to suggestions.
> >
> >> @@ -7548,7 +7548,8 @@ (define_insn
> >> "avx512fp16_vcvtph2<sseintconvertsignprefix><sseintconvert>_<mode><
> >> [(match_operand:<ssePHmode> 1 "<round_nimm_predicate>"
> >> "<round_constraint>")]
> >> UNSPEC_US_FIX_NOTRUNC))]
> >> "TARGET_AVX512FP16 && <round_mode_condition>"
> >> - "vcvtph2<sseintconvertsignprefix><sseintconvert>\t{<round_mask_op2>%1,
> >> %0<mask_operand2>|%0<mask_operand2>, %1<round_mask_op2>}"
> >> +;; %X1 so that we don't emit any *WORD PTR for -masm=intel.
> >> + "vcvtph2<sseintconvertsignprefix><sseintconvert>\t{<round_mask_op2>%1,
> >> %0<mask_operand2>|%0<mask_operand2>, %X1<round_mask_op2>}"
> > Could you define something like
> >
> > ;; Pointer size override for 16-bit upper-convert modes (Intel asm
> > dialect)
> > (define_mode_attr iptrh
> > [(V32HI "") (V16SI "") (V8DI "")
> > (V16HI "") (V8SI "") (V4DI "q")
> > (V8HI "") (V4SI "q") (V2DI "k")])
>
> For my own understanding, was my usage of %X equivalent to a mode_attr
> with an empty string for all cases?
> How did you know which one needed an empty string?
It's in ix86_print_operand
14155 else if (MEM_P (x))
14156 {
14157 rtx addr = XEXP (x, 0);
14158
14159 /* No `byte ptr' prefix for call instructions ... */
14160 if (ASSEMBLER_DIALECT == ASM_INTEL && code != 'X' && code != 'P')
14161 {
14162 machine_mode mode = GET_MODE (x);
14163 const char *size;
14164
14165 /* Check for explicit size override codes. */
14166 if (code == 'b')
14167 size = "BYTE";
14168 else if (code == 'w')
14169 size = "WORD";
14170 else if (code == 'k')
14171 size = "DWORD";
14172 else if (code == 'q')
14173 size = "QWORD";
14174 else if (code == 'x')
14175 size = "XMMWORD";
14176 else if (code == 't')
14177 size = "YMMWORD";
14178 else if (code == 'g')
14179 size = "ZMMWORD";
14180 else if (mode == BLKmode)
14181 /* ... or BLKmode operands, when not overridden. */
14182 size = NULL;
14183 else
14184 switch (GET_MODE_SIZE (mode))
14185 {
14186 case 1: size = "BYTE"; break;
>
> >
> > And use
> > + "vcvtph2<sseintconvertsignprefix><sseintconvert>\t{<round_mask_op2>%1,
> > %0<mask_operand2>|%0<mask_operand2>, %<iptrh>1<round_mask_op2>}"
> >
> >> [(set_attr "type" "ssecvt")
> >> (set_attr "prefix" "evex")
> >> (set_attr "mode" "<sseinsnmode>")])
> >> @@ -29854,7 +29855,8 @@ (define_insn
> >> "avx512dq_vmfpclass<mode><mask_scalar_merge_name>"
> >> UNSPEC_FPCLASS)
> >> (const_int 1)))]
> >> "TARGET_AVX512DQ || VALID_AVX512FP16_REG_MODE(<MODE>mode)"
> >> - "vfpclass<ssescalarmodesuffix>\t{%2, %1,
> >> %0<mask_scalar_merge_operand3>|%0<mask_scalar_merge_operand3>, %1, %2}";
> >> +;; %X1 so that we don't emit any *WORD PTR for -masm=intel.
> >> + "vfpclass<ssescalarmodesuffix>\t{%2, %1,
> >> %0<mask_scalar_merge_operand3>|%0<mask_scalar_merge_operand3>, %X1, %2}";
> >
> > For scaar memory operand rewrite, we usually use <iptr>, so
> > "vfpclass<ssescalarmodesuffix>\t{%2, %1,
> > %0<mask_scalar_merge_operand3>|%0<mask_scalar_merge_operand3>,
> > %<iptr>1, %2}";
> >
> >
> >
> >
--
BR,
Hongtao
