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Hexagon (target/hexagon) replace float32_mul_pow2 with float32_scalbn 

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1617930474-31979-12-git-send-email-tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Taylor Simpson 2021-04-08 20:07:39 -05:00 committed by Richard Henderson
parent c0336c87b7
commit 1cb532fe45
1 changed files with 11 additions and 17 deletions
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28
target/hexagon/arch.c
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@ -143,12 +143,6 @@ void arch_fpop_end(CPUHexagonState *env)
} }
} }
static float32 float32_mul_pow2(float32 a, uint32_t p, float_status *fp_status)
{
float32 b = make_float32((SF_BIAS + p) << SF_MANTBITS);
return float32_mul(a, b, fp_status);
}
int arch_sf_recip_common(float32 *Rs, float32 *Rt, float32 *Rd, int *adjust, int arch_sf_recip_common(float32 *Rs, float32 *Rt, float32 *Rd, int *adjust,
float_status *fp_status) float_status *fp_status)
{ {
@ -217,22 +211,22 @@ int arch_sf_recip_common(float32 *Rs, float32 *Rt, float32 *Rd, int *adjust,
if ((n_exp - d_exp + SF_BIAS) <= SF_MANTBITS) { if ((n_exp - d_exp + SF_BIAS) <= SF_MANTBITS) {
/* Near quotient underflow / inexact Q */ /* Near quotient underflow / inexact Q */
PeV = 0x80; PeV = 0x80;
RtV = float32_mul_pow2(RtV, -64, fp_status); RtV = float32_scalbn(RtV, -64, fp_status);
RsV = float32_mul_pow2(RsV, 64, fp_status); RsV = float32_scalbn(RsV, 64, fp_status);
} else if ((n_exp - d_exp + SF_BIAS) > (SF_MAXEXP - 24)) { } else if ((n_exp - d_exp + SF_BIAS) > (SF_MAXEXP - 24)) {
/* Near quotient overflow */ /* Near quotient overflow */
PeV = 0x40; PeV = 0x40;
RtV = float32_mul_pow2(RtV, 32, fp_status); RtV = float32_scalbn(RtV, 32, fp_status);
RsV = float32_mul_pow2(RsV, -32, fp_status); RsV = float32_scalbn(RsV, -32, fp_status);
} else if (n_exp <= SF_MANTBITS + 2) { } else if (n_exp <= SF_MANTBITS + 2) {
RtV = float32_mul_pow2(RtV, 64, fp_status); RtV = float32_scalbn(RtV, 64, fp_status);
RsV = float32_mul_pow2(RsV, 64, fp_status); RsV = float32_scalbn(RsV, 64, fp_status);
} else if (d_exp <= 1) { } else if (d_exp <= 1) {
RtV = float32_mul_pow2(RtV, 32, fp_status); RtV = float32_scalbn(RtV, 32, fp_status);
RsV = float32_mul_pow2(RsV, 32, fp_status); RsV = float32_scalbn(RsV, 32, fp_status);
} else if (d_exp > 252) { } else if (d_exp > 252) {
RtV = float32_mul_pow2(RtV, -32, fp_status); RtV = float32_scalbn(RtV, -32, fp_status);
RsV = float32_mul_pow2(RsV, -32, fp_status); RsV = float32_scalbn(RsV, -32, fp_status);
} }
RdV = 0; RdV = 0;
ret = 1; ret = 1;
@ -274,7 +268,7 @@ int arch_sf_invsqrt_common(float32 *Rs, float32 *Rd, int *adjust,
/* Basic checks passed */ /* Basic checks passed */
r_exp = float32_getexp(RsV); r_exp = float32_getexp(RsV);
if (r_exp <= 24) { if (r_exp <= 24) {
RsV = float32_mul_pow2(RsV, 64, fp_status); RsV = float32_scalbn(RsV, 64, fp_status);
PeV = 0xe0; PeV = 0xe0;
} }
RdV = 0; RdV = 0;