diff options
| author | Uros Bizjak <ubizjak@gmail.com> | 2020-12-28 16:52:45 +0100 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2020-12-28 16:53:56 +0100 |
| commit | 97d3ddcfc9c67d26e3869a261a506ef70e7f092e (patch) | |
| tree | 08ca52bdc1fc0f4c3f0c9a6a7d2f871edc1f46bc /gcc/config/i386/i386-expand.c | |
| parent | 12ae2bc70846a2be8255eaa41322cd1a5a7b7350 (diff) | |
i386: Use existing temporary register in rounding functions
It is possible to avoid the call to force_reg and use existing
temporary register in ix86_expand_trunc, ix86_expand_round and
ix86_expand_rounddf_32 expanders.
2020-12-28 Uroš Bizjak <ubizjak@gmail.com>
gcc/
* config/i386/i386-expand.c (ix86_expand_trunc): Use
existing temporary register to avoid a call to force_reg.
Diffstat (limited to 'gcc/config/i386/i386-expand.c')
| -rw-r--r-- | gcc/config/i386/i386-expand.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c index c856489c046..5fe38052056 100644 --- a/gcc/config/i386/i386-expand.c +++ b/gcc/config/i386/i386-expand.c @@ -16513,13 +16513,15 @@ ix86_expand_trunc (rtx operand0, rtx operand1) /* if (!isless (xa, TWO52)) goto label; */ label = ix86_expand_sse_compare_and_jump (UNLE, TWO52, xa, false); - /* x = (double)(long)x */ + /* xa = (double)(long)x */ xi = gen_reg_rtx (mode == DFmode ? DImode : SImode); expand_fix (xi, res, 0); - expand_float (res, xi, 0); + expand_float (xa, xi, 0); if (HONOR_SIGNED_ZEROS (mode)) - ix86_sse_copysign_to_positive (res, res, force_reg (mode, operand1), mask); + ix86_sse_copysign_to_positive (xa, xa, res, mask); + + emit_move_insn (res, xa); emit_label (label); LABEL_NUSES (label) = 1; @@ -16629,7 +16631,7 @@ ix86_expand_round (rtx operand0, rtx operand1) expand_float (xa, xi, 0); /* res = copysign (xa, operand1) */ - ix86_sse_copysign_to_positive (res, xa, force_reg (mode, operand1), mask); + ix86_sse_copysign_to_positive (res, xa, res, mask); emit_label (label); LABEL_NUSES (label) = 1; @@ -16700,7 +16702,7 @@ ix86_expand_rounddf_32 (rtx operand0, rtx operand1) xa2 = expand_simple_binop (mode, PLUS, xa2, tmp, NULL_RTX, 0, OPTAB_DIRECT); /* res = copysign (xa2, operand1) */ - ix86_sse_copysign_to_positive (res, xa2, force_reg (mode, operand1), mask); + ix86_sse_copysign_to_positive (res, xa2, res, mask); emit_label (label); LABEL_NUSES (label) = 1; |